Citation:
ZHAO Yi-Yun, YUAN Dong-Mei, WANG Ruo-Nan, BAO Ci-Guang. Application of Uniform Design in Adsorption of Pd2+ Ion by Nitzschia hantzschiana Rabh.[J]. Chinese Journal of Applied Chemistry,
;2003, 20(11): 1105-1107.
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Studies on the adsorption of Pd2+ ion by Nitzschia hantzschiana Rabh., a diatom were carried out. Uniform design was used to arrange the experiment. The growth period of diatom, adsorption time, concentration of Pd2+ and pH were found to have positive effects on the adsorption amount of Pd2+ on diatom. The optimum conditions are: the growth period of diatom 12 days, adsorption time=6 h, [Pd2+]=0.01 g/L and [H+]=0.16 mol/L. EPMA analysis showed that the diameter of the reduced adsorbed Pd was about 1 μm. A mathematical model was found to describe experimental data, that the adsorption fits to Freundlich equation, Q=70.2[Pd2+]0.76. The adsorption amount of Pd2+ on diatom increased logarithmically with the increase of Pd2+ concentration.
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Keywords:
- Nitzschia hantzschiana Rabh,
- palladium,
- adsorption,
- uniform design
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